The Nevada DMV might be the enemy of your Jeep. I'm not positive, but you might have to keep it registered somewhere else. Check with someone in the know to see what kind of difficulties you will have in Clark County. Up here in Washoe County, your motor swap probably wouldn't pass inspection/smog. I have heard that Washoe is more strict with swaps than Clark though.
It's definitely a county by county thing. Thinking that we'd need it, we had Motech get Moby to pass smog inspection in Clark County but of course, we didn't need it here in Carson City County. The DMV clerk here literally looked at our smog certificate and asked, "what's this for"? :crazyeyes: